Buttonhole-sewing machine.



G. S. HILL.

BUTTONHOLE SEWING MACHINE.

APPLICATION FILED DEC. 20, 1912.

1,1 34,046. Patented Mar. 30, 191 5.

3 SHEETS-SHBET 1.

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W v vy-9% G. S. HILL. BUTTONHOLE SEWING MACHINE. APPLICATION FILED DEO.20,1913.

Patented Mar. 30, 1915 3 SHEETS-SHEET 2.

llfiiirzmsast' G. S. HILL.

BUTTONHOLE SEWING MACHINE. APPLIc TmN FILED DEC. 20, 1913.

1,134,046. I Patented Mar. 30, 1915. a SHEETS-SHEET a.

' r I q) 12 X PATMWT GEGEE'E S. HILL, F STRAFFORD, NEW HAMPSHIRE, ASSIGNOR T0 UNITED SHOE MACEHTEBY CQWANY, 0F EATER'SON, NEW JERSEY, A GORPQRATION OF NEW Jensen.

BUTTQNHQLE-SEWING- MACHINE.

Specification of letters Fatent.

Patented man so, leis.

To (121 whom-it may concern:

Be it known that l, GEORGES. HILL, a citizen or" the United States residing at Strefi'ord, in the county of Stradord and State of New Hampshire, have invented certain new and useful improvements in Buttonhole-Sewing Machines; and l do hereby declare the following to he a full, clear, and exact description of the invention, such as will enable others skilled in the art to which apperteins to make and use the same.

The invention relates huttonhole se ing machines, and more particularly to machines in which the worlt holding and stitch forming devices are operated to form overedge stitches extending along the sides and about the ends of the huttonholes.

The object of the invention is to provide sewing mechanism having novel and improved construction and mode of operation which will enable the overedge seam to he formed shout the huttonhole at a rate of speed, end in a uniformly reliahie manner.

To this end one feature of the invention contemplates the provision in a machine in which the feed or relative movement hetween the stitch forming devices and worlt is continuous during the sewing of a reciproosting work piercing n edle which is inclined to line of reci; rocation coinu nsate for the feed during the advance of e needle through the work. thus inclining the needle, the lateral deflection of e needle which would otherwise he caused oy the relative travel hetween the needle and work during the advance or the needle is avoided or minimized, so that the be ef ected at o, more rapid rate r terially displacing the needle with the cooperating stitch orining dei Further features of tee invention relate to in'iprov nents in the looser mechanism hich oper tes with the work piercing neetile in for ng the over-edge seein.

-entures of he invention will he 'ly u derstood fro inspection of J CllilWlKlWS end the followdetailed description of the mechanism illustrated therein. In the vetion showing achine as and Figs. 4 and 5 are detail sectional elevations showing the sewing mechanism.

In the drawings the invention is illustrated as embodied in a huttonhole sewing machine having the general construction and mode of operation of the machine shown and described in Patent No. 1,063.880, granted June 3, 1913. This machine is brovided withia vertically reciprocating miner needle 2 arranged to piece the work lit a predetermined distance from the edge of the huttonhole slit, an oscillating under needle arranged to pass through the huttonhole and a looper G which takes a icon of -ead from the upper needle holds it in gosition for the passage the under needle therethrough. T he work is held during the sewing between clamps 8 and work supporting plates 10 mou n" d on a clamp cal rier 12. The feed or relative movemeh tween the stitch forming mechanism and ;he work is effected by rotating the stitch formi mechanism and moving the clamp carlongitudinally and laterally. The stitch *ning mechanism is rotated from gear through connections fully described in he patent above referred to. The c np crrier is moved longitudinally of the 5 utonhoie by a earn groove a gear 16 engagg a roll on a stud 18 which is secured e carrier, and the clamp carrier is moved laterally by a cam groove in engaging one end of a lever 20 of which engages u block 22 playing in s longitudinal slot in the carrier.

he gears 24: and 16 are continuously en during the sewing and impart :1. coniuous rotation to the stitch forming mechnisrn in sewing about the ends of the hutliole, and continuous movement of the ca ier in sewing the sides of ttonhole so that iced cont nues g the periods when upper needle is e work well as l the periods see it 15 clear oi the wont. acco r nee turning the stitch forming mechanism toward the right. The relative travel of the work with relation to the needle is therefore toward the left in these views, and the needle is inclined forward or in a direction opposite the relative travel of the work. With the needle thus mounted, its inclination to the vertical compensates for the relative travel of the work during the period that the needle is advancing through the work, so that its deflection by the feed is reduced or eliminated. The proper relation between the needle and looper is not therefore materially adected by the feed,"evenwhen the feed is efiected at a rapid rate. The needle will be deflected during its withdrawal from the work, but the deflection of the needle after the looper has taken the loop does not affect the accurate operation of the parts.

lln the construction shown, the looper 6 is adj ustably secured in a looper carrying arm 26 which is connected with the end of a horizontally swinging supporting arm 28 by a vertical pivot stud 30. The looper carrying arm is providedwith a cylindrical extension 32 arranged to slide through a guide sleeve 34: which cooperates with the swinging arm 28 in determining the path of movement of the looper. lhe guide sleeve is formed on the upper end of a vertical shaft 36 which is mounted to turn freely in a bearing formed in the turret 38 by which the under needle and looper mechanism is carried. The arm 28 is formed on the upper end of a vertical rock shaft 40, and is operated from the needle operating lever 42 through a link 4% connecting an arm 46 on the lower end of the shaft with an arm l8 on the hub of the lever. is swung from the position indicated in Fig. 3 to the position indicated in l ig. 2, the extension 32 of the looper carrying arm slides through the guide sleeve 34 which turns about its axis and cooperates with the arm 28 in determining the path of movement of the locper. The axes about which the arm 29 and guide 32 swing are so located, and the parts are so proportioned, that the looper is given the proper path to take the loop from the upper needle and carry it over the under needle. This construction enables the lcoper to be properly timed and move through the proper path with a compare lively short travel of the looper, and also maintains the looper under positive control with comparatively little strain or friction on the parts, so that the looper will operate imiformly and accurately at high speed and with little wear.

While the invention has been shown embodied in the machine of the patent above referred to,,it will be understood that it is not confined in its application to this ma chine, but may be embodied in other forms of machines. It will also be understood As the looper carrying arm 28 that the specific construction and arrange ment of the parts shown and described is not essential to the broader features of the invention, and may be varied and modified as found desirable or best suited to the construction of the cooperating parts in which the invention may be embodied.

Having explained the nature and object of the invention, and having specifically de scribed one form of machine in which it may be embodied, what is claimed is 2' 1. A buttonhole sewing machine, having, in combination, stitch forming devices including a reciprocating needle inclined to its line of reciprocation through'the work, and mechanism for relatively moving the work and stitch forming mechanism while the needle is inthe work.

2. A buttonhole sewing machine, having, in combination, stitch forming devices including a reciprocating needle inclined-to its line of reciprocation through the work, and mechanism for causing a continuous relative movement between the stitch forming devices and work during the sewing.

3. A buttonhole sewing machine, having, in combination, a work clamp, stitch forming devices including a reciprocating needle inclined to its line of reciprocation, and mechanism for causing a continuous relative movement between the clamp and stitch forming devices during the sewing.

d. A buttonhole sew n mace, having, in combination, a work c amp, a reciprocating needle inclined to compensate for the relative travel of the work during the.ad-. vance of the needle therethrough, devices oooperating with the needle to form overedge stitches, and mechanism for causing a continuous relative movement between the work clamp and stitch forming devices during the sewing. l

5. A. buttonhole sewing machine, having, in combination, a work clamp, a vertically reciprocating upper needle inclined to compensate for the relative travel or the work during the advance of the needle therethrough, a coiiperatingunder needle and looper, and mechanism for causing a continuous relative movement between the work J15 clamp and stitch forming devices during the sewing. v

6. A buttonhole sewing mace, having, in combination, upper and under needles, a looper carrying arm, a pivoted guide having a sliding connection with the arm, and mechanism for reciprocating the arm and swinging it about the pivot of the guide.

7. A. buttonhole sewing machine, having, in combination, upper and under needles, a looper carrying arm, and mechanism for actuating the arm including a pivoted guide havin, sliding connection therewith.

8. A buttonhole sewing machine, having, in combination, upper and under needles, a

looper carrying arm, a swinging arm on which the loopcr arm is pivoted, and a pivoted guide having sliding engagement with the looper carrying arm.

9. A buttonhole sewing machine, having, in combination, upper and under needles, an arm mounted to swing about a vertical axis, a loopcr carrying arm connected thereto by a vertical pivot, and a guide having sliding engagement with the looper arm mounted 10 to swing about a vertical pivot.

GEORGE S. HILL.

Witnesses:

CHESTER E. Rooms, LAURA M. Gconn, 

